Question

A teacher is a person whose professional activity involves planning ,organising and conducting group activities to develop student's knowledge ,skills and attitude as stipulated by educational programmes. Teachers may work with students as a whole class, in small groups or one-to-one , inside or outside regular classroom. In this indicator, teachers are compared by their average age and work experience measured in years. For the same in 2015 ,the following distribution of ages (in years) of primary school teachers in a district was collected to evaluate the teacher on the above mentioned criterion. (i) write the lower limit of the first class interval (ii) determine the class limits of the fourth class interval (iii) find the class mark of class 45-50 (iv) determine the class size (v) facts or figures collected with a definite purpose are called​

Answer 1

Answer: Taking them in bar graph (Photo given)

Step-by-step explanation:

(i) write the lower limit of the first class interval

Ans: First class interval = 15-20

= 15 is the lower limit

(ii) determine the class limits of the fourth class interval

Ans: Class limit = 30-35 (Check graph for fourth class interval)

(iii) find the class mark of class 45-50

Ans: Class mark(Mid value of class interval) = 47.5

(iv) determine the class size

Ans: Class size = 5 (eg: 40-45,50-55 etc.)

(v) facts or figures collected with a definite purpose are called​

Ans: Data

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